1. To begin with, please confirm that you have created the floppy according to the following procedure:
With access to a Windows PC (capable of running a DOS program) with a floppy drive , you may want to try this: Prepare an empty PC-formatted 1.44 MB diskette via FORMAT A: in DOS or the "full" formatting option under Windows. Download the MACDISK.EXE file from http://rrzs42.uni-regensburg.de/Macintosh/files/macftp.html . Run the MACDISK.EXE (DOS) program on the Windows PC. Follow the instructions on screen. The result will be a Mac-formatted (sic!) floppy that can be immediately used in the Macintosh Classic. This floppy contains a StuffIt Expander installer.
2. Did you copy the StuffIt Expander installer to the Macintosh Classic hard disk? Did the installer work as expected?
3. After the installation, do you have a working StuffIt Expander (4.0.1) utility (with a special, not generic, program icon) on the Macintosh Classic?
4. It may not be a bad idea to test a decoding operation with another BinHex (.hqx) file from http://archive.info-mac.org/ or http://umich.edu/~archive/mac/.
5. >if i unstuff a hqx file it if gives me constant errors
Is this during the decoding of an hqx file, or is it later during an attempted decompression of a compressed file (for example, .sit, .sea, .cpt) inside? Exactly what kind of error?
6. >i found a stuffit in a bin file and there is just giving me an address error and i need to restart the mac
Are you trying to use StuffIt Expander 4.0.1 to decode a dowloaded MacBinary (.bin) file containing another version of StuffIt (Expander)? A later StuffIt Expander version may not work on a System 7.1 Macintosh Classic.